JPH1181511A - Vacuum thermal insulating body, refrigerator, thermal insulating panel and manufacture of vacuum thermal insulating body - Google Patents
Vacuum thermal insulating body, refrigerator, thermal insulating panel and manufacture of vacuum thermal insulating bodyInfo
- Publication number
- JPH1181511A JPH1181511A JP9248075A JP24807597A JPH1181511A JP H1181511 A JPH1181511 A JP H1181511A JP 9248075 A JP9248075 A JP 9248075A JP 24807597 A JP24807597 A JP 24807597A JP H1181511 A JPH1181511 A JP H1181511A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- vacuum
- vacuum heat
- insulator
- urethane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/242—Slab shaped vacuum insulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、冷蔵庫または建築
物の断熱材として使用可能な真空断熱体及び断熱パネル
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum heat insulator and a heat insulation panel which can be used as a heat insulator for a refrigerator or a building.
【０００２】[0002]
【従来の技術】近年、地球環境保護の観点から、冷蔵庫
用断熱材の発泡剤として使用されているＣＦＣ１１によ
るオゾン層破壊が、地球的規模で注目されている。この
ような背景から、新規発泡剤を用いた断熱材の研究が行
われており、代替フロンとしては、ＨＣＦＣ１４１ｂ、
非フロン系では、シクロペンタン等が候補として選ばれ
つつある。2. Description of the Related Art In recent years, from the viewpoint of protection of the global environment, destruction of the ozone layer by CFC11, which is used as a foaming agent for heat insulating materials for refrigerators, has attracted attention on a global scale. From such a background, research on a heat insulating material using a novel foaming agent has been conducted, and HCFC141b,
In the non-fluorocarbon system, cyclopentane and the like are being selected as candidates.
【０００３】しかしながら、これらの新規発泡剤は、い
ずれも、ＣＦＣ１１より気体熱伝導率が大きく、冷蔵庫
の断熱性能低下は避けられない状況下にある。一方、将
来のエネルギー規制に対し、冷蔵庫の省エネルギー化は
避けられない問題であり、断熱性能向上は達成すべき大
きな課題である。[0003] However, all of these new foaming agents have a higher gas thermal conductivity than CFC11, and the heat insulation performance of the refrigerator is inevitably reduced. On the other hand, energy saving of refrigerators is an unavoidable problem with respect to future energy regulations, and improving heat insulation performance is a major issue to be achieved.
【０００４】このような課題を解決する一手段として無
機粉末を用いた真空断熱体が考案され、その内容が、特
開昭５７−１７３６８９号公報に記載されている。その
内容は、フィルム状プラスチック容器に、単粒子が１μ
ｍ以下の粉末を充填し内部を減圧後密封することによ
り、真空断熱体を得ると言うものである。As one means for solving such a problem, a vacuum heat insulator using inorganic powder has been devised, and the contents thereof are described in Japanese Patent Application Laid-Open No. 57-173689. The content is that a single particle is 1μ in a film-shaped plastic container.
In this case, a vacuum heat insulator is obtained by filling powder having a diameter of m or less, sealing the inside after reducing the pressure.
【０００５】効果としては、工業化が容易な０．１〜１
ｍｍＨｇの真空度で製造することができ、シリカ粉末が
微粒子であるため、同じ真空度の場合、真空断熱体の断
熱性能がより向上することを見出したものである。The effect is 0.1 to 1 which is easy to industrialize.
It has been found that the heat insulation performance of a vacuum heat insulator can be further improved at the same degree of vacuum because the silica powder can be produced at a vacuum degree of mmHg and the silica powder is fine particles.
【０００６】また、特開昭５７−１３３８７０号公報で
述べられている連続気泡構造の硬質ウレタンフォームを
用いた真空断熱体は、粉末真空断熱体に比べて軽量であ
り、かつ、真空包装工程での取り扱いが良好であるとし
ている。A vacuum insulator using rigid urethane foam having an open-cell structure described in Japanese Patent Application Laid-Open No. 57-133870 is lighter in weight than a powder vacuum insulator, and is used in a vacuum packaging process. Has good handling.
【０００７】[0007]
【発明が解決しようとする課題】真空断熱体の断熱原理
は、熱を伝える空気を排除することである。しかしなが
ら工業レベルにおいて高真空を得ることは困難であり、
実用的に到達可能な真空度は０．１〜１０ｍｍＨｇであ
る。The heat insulating principle of a vacuum heat insulator is to eliminate air that conducts heat. However, it is difficult to obtain a high vacuum at the industrial level,
The practically achievable degree of vacuum is 0.1 to 10 mmHg.
【０００８】したがって、この真空度で目的とする断熱
性能を得ることが必要である。空気が介在して熱伝導が
行われる場合の断熱性能に影響を及ぼす物性として、平
均自由行程がある。平均自由行程とは、空気を構成する
分子の一つが別の分子と衝突するまでに進む距離のこと
で、平均自由行程よりも形成されている空隙が大きい場
合は空隙内において分子同士が衝突し、空気による熱伝
導が生じるため真空断熱体の熱伝導は大きくなる。逆に
平均自由行程よりも空隙が小さい場合は真空断熱体の熱
伝導は小さくなる。これは、空気の衝突による熱伝導が
ほとんどなくなるためである。[0008] Therefore, it is necessary to obtain the desired heat insulating performance at this degree of vacuum. There is a mean free path as a physical property that affects the heat insulation performance when heat is conducted through air. The mean free path is the distance that one of the molecules that make up air travels before colliding with another molecule.If the gap formed is larger than the mean free path, the molecules collide with each other within the gap. In addition, heat conduction by air occurs, so that the heat conduction of the vacuum heat insulator increases. Conversely, when the gap is smaller than the mean free path, the heat conduction of the vacuum insulator becomes smaller. This is because there is almost no heat conduction due to the collision of air.
【０００９】したがって、特開昭５７−１７３６８９号
公報に記載されている真空断熱体では、シリカ粉末等の
微細な粒径を有する粉末を用いるため、空隙が細かくな
り、空気の衝突による熱伝導がほとんどなくなる。この
結果、真空断熱体の熱伝導率が向上する。Therefore, in the vacuum heat insulator described in Japanese Patent Application Laid-Open No. 57-173689, since a powder having a fine particle size such as a silica powder is used, the gap becomes fine, and the heat conduction due to the collision of air is reduced. Almost gone. As a result, the thermal conductivity of the vacuum heat insulator improves.
【００１０】しかし、従来の構成では、シリカ粉末が微
細な粒径を有するため、比表面積に対する自重が軽く飛
散し易い。そのため、作業性が悪化する問題があった。
また、球状の粒子形状であるため、高密度化が避けられ
ず、真空断熱体自体の重量が、重くなる。However, in the conventional structure, since the silica powder has a fine particle size, its own weight relative to the specific surface area is light and easily scattered. Therefore, there was a problem that workability deteriorated.
In addition, because of the spherical particle shape, high density is inevitable, and the weight of the vacuum heat insulator itself becomes heavy.
【００１１】また、特開昭５７−１３３８７０号公報で
述べられている真空断熱体では、連通気泡構造の硬質ウ
レタンフォーム製造時の歩留まりが悪く、コストが掛か
りすぎる問題があった。The vacuum insulator described in Japanese Patent Application Laid-Open No. 57-133870 has a problem that the yield at the time of producing a rigid urethane foam having an open-cell structure is poor and the cost is too high.
【００１２】上記課題を鑑み、真空断熱体の芯材とし
て、冷蔵庫及び建材等の廃棄によって不要になった硬質
ウレタンフォーム等を含む粉末材料を利用する試みがあ
る。このことにより、安価で軽量な真空断熱体を得るこ
とができるものである。[0012] In view of the above problems, there has been an attempt to use a powder material containing hard urethane foam or the like which is no longer needed due to disposal of refrigerators and building materials as a core material of a vacuum heat insulator. As a result, an inexpensive and lightweight vacuum heat insulator can be obtained.
【００１３】しかし、この時、粉末材料が少なくとも硬
質ウレタンフォームを有しているため、ウレタン樹脂中
に多数存在する親水基が、大気中の水分を容易に取り込
むため、外被材中に真空減圧包装を行った後も、ウレタ
ン粉末の表面吸着及び、吸蔵水の離脱により、真空度が
悪化し、気体による熱伝導が増大する課題があった。However, at this time, since the powder material has at least a rigid urethane foam, a large number of hydrophilic groups in the urethane resin easily take in moisture in the atmosphere, so that a vacuum pressure is applied to the jacket material. Even after packaging, there is a problem that the degree of vacuum is deteriorated due to surface adsorption of urethane powder and desorption of occluded water, and heat conduction by gas is increased.
【００１４】[0014]
【課題を解決するための手段】本発明の真空断熱体は、
外被材中に粉末材料からなる芯材を充填し減圧密封した
真空断熱体において、前記粉末材料が少なくとも硬質ウ
レタンフォーム粉末を有しており、これに、ウレタン粉
末よりも大きい比表面積を持つ水分吸着剤をブレンドし
たことを特徴とするものである。The vacuum insulator of the present invention comprises:
In a vacuum heat insulator in which a core material made of a powder material is filled in a jacket material and sealed under reduced pressure, the powder material has at least a hard urethane foam powder, and a water having a specific surface area larger than that of the urethane powder. It is characterized by blending an adsorbent.
【００１５】我々は、水分吸着剤の仕様について鋭意研
究を重ねた結果、ウレタン粉末よりも大きい比表面積を
有する吸着剤を適用することにより効果的に水分を除去
できることを見いだした。これは、ウレタン粉末よりも
大きい比表面積を有する水分吸着剤を適用することによ
り、ウレタン粉末に対する付着エネルギーが大きくな
り、少量の添加で均一に吸着剤をウレタン表面上に分散
することができたためと推測される。As a result of intensive studies on the specification of the moisture adsorbent, it has been found that water can be effectively removed by using an adsorbent having a specific surface area larger than that of urethane powder. This is because the application of a moisture adsorbent having a larger specific surface area than the urethane powder increases the adhesion energy to the urethane powder, and the adsorbent can be uniformly dispersed on the urethane surface with a small amount of addition. Guessed.
【００１６】また、本発明の真空断熱体は、ウレタン粉
末の比表面積よりも５〜２０倍大きい比表面積を有する
水分吸着剤を用いることを特徴とするものである。The vacuum heat insulator of the present invention is characterized in that a water adsorbent having a specific surface area 5 to 20 times larger than the specific surface area of the urethane powder is used.
【００１７】これにより、ウレタン粉末よりも大きい比
表面積を有する水分吸着剤の中でも上記範囲の比表面積
を有する水分吸着剤が効果的に水分を除去できるもので
ある。Thus, among the water adsorbents having a specific surface area larger than that of the urethane powder, the water adsorbent having a specific surface area in the above range can effectively remove water.
【００１８】これは、吸着剤のウレタンに対する付着エ
ネルギーが、吸着剤自身が有する運動エネルギーよりも
大きいことが寄与していると考えられる。This is considered to be due to the fact that the adhering energy of the adsorbent to urethane is larger than the kinetic energy of the adsorbent itself.
【００１９】また、本発明の真空断熱体は、１２０℃か
ら２５０℃の温度で加熱脱水を行った後、もしくは同時
に５〜１００ｋｇ／ｃｍ2の条件下で加圧成形を行うこ
とを特徴とする請求項２記載の真空断熱体である。Further, the vacuum heat insulator of the present invention is characterized in that after heat dehydration at a temperature of 120 ° C. to 250 ° C., or at the same time, pressure molding is performed under a condition of 5 to 100 kg / cm 2. A vacuum heat insulator according to claim 2.
【００２０】このことにより、粉末が凝集した状態で外
被材に挿入するため、粉末の飛散がなくなり、製造時の
作業効率が向上するものである。As a result, since the powder is inserted into the outer cover material in a coagulated state, the scattering of the powder is eliminated and the working efficiency at the time of manufacturing is improved.
【００２１】また、本発明の冷蔵庫は、発泡合成樹脂と
内箱と外箱と真空断熱体とによって構成された断熱箱体
であり、この真空断熱体の構成は、粉末からなる芯材を
充填し減圧密封したものであり、この粉末材料が少なく
とも硬質ウレタンフォーム粉末を有しており、これにウ
レタン粉末よりも大きい比表面積を持つ水分吸着剤をブ
レンドしたものである。Further, the refrigerator of the present invention is a heat insulating box composed of a foamed synthetic resin, an inner box, an outer box and a vacuum heat insulator, and the structure of the vacuum heat insulator is filled with a core material made of powder. This powder material has at least a hard urethane foam powder, and is blended with a moisture adsorbent having a specific surface area larger than that of the urethane powder.
【００２２】これにより、吸着水分の離脱による真空度
の悪化に起因した熱伝導率の悪化を抑制することがで
き、冷蔵庫に適用した場合、長期に亘って使用しても真
空断熱体の断熱性能を維持することができる。この結
果、真空断熱体の急激な熱伝導率の悪化に起因したコン
プレッサーの過剰運転による冷蔵庫の信頼性が低下する
といった問題が解決される。As a result, it is possible to suppress the deterioration of the thermal conductivity due to the deterioration of the degree of vacuum due to the desorption of the adsorbed moisture. When applied to a refrigerator, the heat insulating performance of the vacuum heat insulator can be maintained for a long time. Can be maintained. As a result, the problem that the reliability of the refrigerator is reduced due to the excessive operation of the compressor due to the rapid deterioration of the thermal conductivity of the vacuum heat insulator is solved.
【００２３】また、本発明の断熱パネルは、発泡合成樹
脂と面材と真空断熱体を備え、この真空断熱体は、複数
個あり、かつそれぞれの真空断熱体が発泡合成樹脂によ
って覆われている断熱パネルである。また、真空断熱体
の構成は粉末からなる芯材を充填し減圧密封したもので
あり、この粉末材料が少なくとも硬質ウレタンフォーム
粉末を有しており、これにウレタン粉末よりも大きい比
表面積を持つ水分吸着剤をブレンドしたものである。Further, the heat insulating panel of the present invention comprises a foam synthetic resin, a face material and a vacuum heat insulator, and there are a plurality of vacuum heat insulators, each of which is covered with the foam synthetic resin. It is an insulation panel. In addition, the structure of the vacuum heat insulator is a structure in which a core material made of powder is filled and sealed under reduced pressure. This powder material has at least a hard urethane foam powder, and has a specific surface area larger than that of the urethane powder. It is a blend of adsorbents.
【００２４】これにより、真空断熱体の断熱性能が非常
に優れているため、硬質ウレタンフォーム等の発泡合成
樹脂と併用した場合、断熱パネル全体の断熱性能が硬質
ウレタンフォーム等を単独で使用した場合よりも優れた
ものとなる。As a result, the heat insulation performance of the vacuum heat insulator is extremely excellent, so that when used in combination with a foamed synthetic resin such as hard urethane foam, the heat insulation performance of the entire heat insulation panel is reduced when the hard urethane foam or the like is used alone. Will be better than
【００２５】また、真空断熱体が発泡合成樹脂で覆われ
ているため、真空断熱体に直接衝撃が加わることがな
く、破袋等によって真空断熱体の断熱性能が著しく悪化
するといった問題がない。Further, since the vacuum heat insulator is covered with the synthetic resin foam, no direct impact is applied to the vacuum heat insulator, and there is no problem that the heat insulation performance of the vacuum heat insulator is remarkably deteriorated due to breakage of the bag.
【００２６】さらに、現場施工によって断熱パネルを切
断する場合等も、複数個の真空断熱体を有するため、破
袋する真空断熱体は一部にすぎず断熱性能を大きく悪化
することがない。特に、真空断熱体には凝集体または成
型体が充填されているため、切断面から粉末が飛び散る
ことがなく、施工現場での作業性を損なうことがない。Further, even in the case of cutting the heat insulating panel by on-site construction, since a plurality of vacuum heat insulators are provided, only a part of the vacuum heat insulator breaks and the heat insulating performance is not significantly deteriorated. In particular, since the vacuum insulator is filled with the aggregate or the molded body, the powder does not scatter from the cut surface, and the workability at the construction site is not impaired.
【００２７】また、本発明による真空断熱体の製造方法
は、硬質ウレタンフォーム粉末を有する芯材とウレタン
粉末よりも大きい比表面積を持つ水分吸着剤をブレンド
して得た請求項３記載の成形体を非通気性の外被材に挿
入し、内部を減圧密封した真空断熱体の製造方法であ
る。The method of manufacturing a vacuum insulator according to the present invention, wherein the molded body is obtained by blending a core material having a hard urethane foam powder and a moisture adsorbent having a specific surface area larger than that of the urethane powder. Is inserted into a non-breathable outer cover material, and the inside is sealed under reduced pressure to produce a vacuum heat insulator.
【００２８】これにより、粉末を凝集した状態で外被材
に挿入するため、粉末の飛散がなくなり製造時の作業効
率が向上するものである。As a result, since the powder is inserted into the outer cover material in an agglomerated state, the scattering of the powder is eliminated and the working efficiency at the time of manufacturing is improved.
【００２９】[0029]
【発明の実施の形態】本発明の請求項１に記載の発明
は、外被材中に粉末剤料からなる芯材を充填し減圧密封
した真空断熱体において、前記粉末材料が少なくとも硬
質ウレタンフォーム粉末を有しており、これに、ウレタ
ン粉末よりも大きい比表面積を持つ水分吸着剤をブレン
ドしたことを特徴とする真空断熱体である。DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is directed to a vacuum heat insulator in which a core material made of a powder material is filled in a jacket material and sealed under reduced pressure, wherein the powder material is at least hard urethane foam. A vacuum heat insulator comprising powder, and blended with a moisture adsorbent having a specific surface area larger than that of urethane powder.
【００３０】これにより、ウレタン粉末に比べ、吸着剤
のウレタン粉末に対する付着エネルギーが大きくなり、
少量の添加で均一に吸着剤をウレタン表面上に分散する
ことができる。よって、吸着剤の添加量を低減すること
が可能となり、コストダウンの効果を生むと同時に、性
能面では、吸着剤自身が有する固体熱伝導を低減するこ
とができるものである。As a result, the adsorbent has a larger adhesion energy to the urethane powder than the urethane powder,
With a small amount of addition, the adsorbent can be uniformly dispersed on the urethane surface. Therefore, it is possible to reduce the amount of the adsorbent to be added, and it is possible to reduce the cost, and to reduce the solid heat conduction of the adsorbent itself in terms of performance.
【００３１】また、本発明の請求項２に記載の発明は、
ウレタン粉末の比表面積よりも５〜２０倍大きい比表面
積を有する水分吸着剤を用いることを特徴とする請求項
１記載の真空断熱体である。Further, the invention described in claim 2 of the present invention provides
2. The vacuum heat insulator according to claim 1, wherein a moisture adsorbent having a specific surface area 5 to 20 times larger than the specific surface area of the urethane powder is used.
【００３２】これにより、ウレタン粉末よりも大きい比
表面積を有する水分吸着剤の中でも上記範囲の比表面積
を有する水分吸着剤が効果的に水分を除去できるもので
ある。これは、吸着剤のウレタンに対する付着エネルギ
ーが、吸着剤自身が有する運動エネルギーよりも大きい
ことが寄与していると考えられる。Thus, among the water adsorbents having a specific surface area larger than that of the urethane powder, the water adsorbent having a specific surface area in the above range can effectively remove water. This is considered to be due to the fact that the adhesive energy of the adsorbent to urethane is larger than the kinetic energy of the adsorbent itself.
【００３３】また、本発明の請求項３に記載の発明は、
１２０℃から２５０℃の温度で加熱脱水を行った後、も
しくは同時に５〜１００ｋｇ／ｃｍ2の条件下で加圧成
形を行うことを特徴とする請求項２記載の真空断熱体で
ある。Further, the invention according to claim 3 of the present invention provides:
3. The vacuum heat insulator according to claim 2, wherein the pressure molding is performed after the heat dehydration at a temperature of 120 to 250 [deg.] C. or at the same time under a condition of 5 to 100 kg / cm < 2 >.
【００３４】これにより、粉末を凝集した状態で外被材
に挿入するため、粉末の飛散がなくなり製造時の作業効
率が向上するものである。As a result, since the powder is inserted into the outer cover material in an agglomerated state, the scattering of the powder is eliminated, and the working efficiency at the time of manufacturing is improved.
【００３５】また、本発明の請求項４に記載の発明は、
発泡合成樹脂と内箱と外箱と真空断熱体とによって構成
された断熱箱体であり、この真空断熱体の構成が、粉末
からなる芯材を充填し減圧密封したものであり、この粉
末材料が少なくとも硬質ウレタンフォーム粉末を有して
おり、これにウレタン粉末よりも大きい比表面積を持つ
水分吸着剤をブレンドすることを特徴とする断熱箱体で
ある。Further, the invention described in claim 4 of the present invention provides:
An insulating box composed of a foamed synthetic resin, an inner box, an outer box, and a vacuum heat insulator. The structure of the vacuum heat insulator is obtained by filling a core material made of powder and sealing it under reduced pressure. Has at least a rigid urethane foam powder, and a water adsorbent having a specific surface area larger than that of the urethane powder is blended with the urethane foam powder.
【００３６】これにより、冷蔵庫に適用した場合、長期
に亘って使用しても真空断熱体の断熱性能を維持するこ
とができる。この結果、真空断熱体の急激な熱伝導率の
悪化に起因したコンプレッサーの過剰運転による冷蔵庫
の信頼性が低下するといった問題が解決される。Thus, when applied to a refrigerator, the heat insulating performance of the vacuum heat insulator can be maintained even when used for a long time. As a result, the problem that the reliability of the refrigerator is reduced due to the excessive operation of the compressor due to the rapid deterioration of the thermal conductivity of the vacuum heat insulator is solved.
【００３７】また、本発明の請求項５に記載の発明は、
発泡合成樹脂と面材と真空断熱体を備え、この真空断熱
体は、複数個有し、かつそれぞれの真空断熱体が発泡合
成樹脂によって覆われている断熱パネルであり、この真
空断熱体の構成が粉末からなる芯材を充填し減圧密封し
たものであり、かつ粉末材料が少なくとも硬質ウレタン
フォーム粉末を有しており、これにウレタン粉末よりも
大きい比表面積を持つ水分吸着剤をブレンドすることを
特徴とする断熱パネルである。Further, the invention according to claim 5 of the present invention provides:
The heat insulating panel includes a foam synthetic resin, a face material, and a vacuum heat insulator. The vacuum heat insulator is a heat insulating panel having a plurality of vacuum heat insulators, each of which is covered with the foam synthetic resin. Is filled with a powder core material and sealed under reduced pressure, and the powder material has at least a hard urethane foam powder, and a moisture adsorbent having a specific surface area larger than that of the urethane powder is blended with the powder material. It is a heat insulating panel characterized by the following.
【００３８】これにより、真空断熱体の断熱性能が非常
に優れているため、硬質ウレタンフォーム等の発泡合成
樹脂と併用した場合、断熱パネル全体の断熱性能が硬質
ウレタンフォーム等を単独で使用した場合よりも優れた
ものとなる。[0038] Because of this, the heat insulation performance of the vacuum heat insulator is extremely excellent, and when used together with a foamed synthetic resin such as rigid urethane foam, the heat insulation performance of the entire heat insulation panel is reduced when the hard urethane foam or the like is used alone. Will be better than
【００３９】また、真空断熱体が発泡合成樹脂で覆われ
ているため、真空断熱体に直接衝撃が加わることがな
く、破袋等によって真空断熱体の断熱性能が著しく悪化
するといった問題がない。Further, since the vacuum heat insulator is covered with the foamed synthetic resin, no direct impact is applied to the vacuum heat insulator, and there is no problem that the heat insulation performance of the vacuum heat insulator is remarkably deteriorated due to bag breakage or the like.
【００４０】さらに、現場施工によって断熱パネルを切
断する場合等も、複数個の真空断熱体を有するため、破
袋する真空断熱体は一部にすぎず断熱性能を大きく悪化
することがない。特に、真空断熱体には凝集体または成
型体が充填されているため、切断面から粉末が飛び散る
ことがなく、施工現場での作業性を損なうことがない。Further, even in the case of cutting the heat insulating panel by on-site construction, since a plurality of vacuum heat insulators are provided, only a part of the vacuum heat insulator breaks and the heat insulating performance is not significantly deteriorated. In particular, since the vacuum insulator is filled with the aggregate or the molded body, the powder does not scatter from the cut surface, and the workability at the construction site is not impaired.
【００４１】また、本発明の請求項６に記載の発明は、
硬質ウレタンフォーム粉末を有する芯材とウレタン粉末
よりも大きい比表面積を持つ水分吸着剤をブレンドして
得た請求項３記載の成形体を非通気性の外被材に挿入
し、内部を減圧密封した真空断熱体の製造方法に関する
ものである。The invention according to claim 6 of the present invention provides:
4. The molded product according to claim 3, which is obtained by blending a core material having a rigid urethane foam powder and a moisture adsorbent having a specific surface area larger than that of the urethane powder, is inserted into a non-breathable jacket material, and the inside is sealed under reduced pressure. The present invention relates to a method for manufacturing a vacuum insulator.
【００４２】これにより、粉末を凝集した状態で外被材
に挿入するため、粉末の飛散がなくなり製造時の作業効
率が向上するものである。As a result, since the powder is inserted into the outer cover material in an agglomerated state, the scattering of the powder is eliminated and the working efficiency at the time of manufacturing is improved.
【００４３】[0043]
【実施例】以下、本発明の実施例について、図面を参照
しながら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００４４】（実施例１）図１は本発明の一実施例にお
ける真空断熱体の断面図であり、１は真空断熱体、２は
硬質ウレタンフォーム粉末からなる芯材、３は硬質ウレ
タンフォーム粉末よりも大きい比表面積を持つ水分吸着
剤、４は金属箔または金属蒸着層を有するプラスチック
ラミネートフィルムからなる外被材である。(Embodiment 1) FIG. 1 is a cross-sectional view of a vacuum heat insulator according to an embodiment of the present invention, wherein 1 is a vacuum heat insulator, 2 is a core material made of hard urethane foam powder, and 3 is a hard urethane foam powder. The moisture adsorbent 4 having a larger specific surface area is a jacket material made of a metal foil or a plastic laminate film having a metal deposition layer.
【００４５】芯材２は、硬質ウレタンフォーム粉末であ
り、ポリイソシアネートとポリオールに添加剤を充填し
て発泡したものであり、現在工業的に広範囲で使用され
ている硬質ウレタンフォームを粉砕したものである。添
加剤は、発泡剤、整泡剤、アミン系触媒等、発泡の反応
性の調整やフォーム強度を確保するためのものである。
また、粉末は、断熱性を考慮して、粒径が３００μｍ以
下となるように微粉砕を行ったものを使用した。The core material 2 is a rigid urethane foam powder, which is obtained by filling a polyisocyanate and a polyol with an additive and foaming the material, and is obtained by pulverizing a rigid urethane foam which is currently widely used industrially. is there. Additives, such as a foaming agent, a foam stabilizer, and an amine catalyst, are for adjusting foaming reactivity and ensuring foam strength.
The powder used was finely pulverized so as to have a particle diameter of 300 μm or less in consideration of heat insulation.
【００４６】硬質ウレタンフォーム粉末は、１００μｍ
〜３００μｍの気泡径を有する発泡体を粉砕しているた
め、気泡骨格と気泡膜の一部を有する複雑な針状構造と
なる。したがって、隣り合う粉末同士が立体障害を持つ
ため、真空断熱体を低密度に保つことができる。Hard urethane foam powder is 100 μm
Since a foam having a cell diameter of about 300 μm is pulverized, a complex needle-like structure having a cell skeleton and a part of a cell membrane is obtained. Therefore, since the adjacent powders have a steric hindrance, the vacuum insulator can be kept at a low density.
【００４７】また、硬質ウレタンフォーム粉末は、粉末
であるため比表面積が５０〜１００ｍ3／ｇ大きく、表
面吸着水を有している。我々は、加熱乾燥によってかな
りこれを除去することができたが、十分ではなく、経時
的な熱伝導率の悪化が問題となった。The hard urethane foam powder is a powder, and therefore has a large specific surface area of 50 to 100 m 3 / g and has surface adsorbed water. We were able to remove this considerably by heating and drying, but this was not sufficient, and the degradation of thermal conductivity over time was a problem.
【００４８】そこで、吸着剤の仕様を検討した結果、ウ
レタン粉末の持つ比表面積の５倍〜２０倍の比表面積を
有するものが、水分吸着能力に優れていた。具体的に水
分吸着剤としては、粒子形状が均一であることからゼオ
ライトを使用することが望ましいと考えるが、活性アル
ミナ、シリカゲル、五酸化燐、無水塩化カルシウム等で
も、上記の比表面積を有するものであれば、特に問題な
かった。Then, as a result of examining the specifications of the adsorbent, those having a specific surface area of 5 to 20 times the specific surface area of the urethane powder were found to have excellent moisture adsorption ability. Specifically, it is considered preferable to use zeolite as the moisture adsorbent because the particle shape is uniform, but activated alumina, silica gel, phosphorus pentoxide, anhydrous calcium chloride, and the like having the above specific surface area If so, there was no particular problem.
【００４９】この吸着メカニズムは明確でないが、ウレ
タン粉末に比べ吸着剤の比表面積が５〜２０倍にあるも
のは、ウレタン粉末に対する付着エネルギーが吸着剤自
身の持つ運動エネルギーより大きくなったことが主たる
要因であると推測される。Although the mechanism of this adsorption is not clear, the adsorbent whose specific surface area is 5 to 20 times as large as the urethane powder has a larger adhesion energy to the urethane powder than the kinetic energy of the adsorbent itself. Presumed to be a factor.
【００５０】また、ウレタン粉末に比べ、吸着剤の比表
面積が２０倍以上になると吸着効果が低減した。これ
は、比表面積を必要以上に大きくすることにより、吸着
剤同士の付着エネルギーが向上し、吸着剤の凝集が進行
した結果、見かけ上比表面積が低減したためと推測され
る。When the specific surface area of the adsorbent was 20 times or more as compared with the urethane powder, the adsorption effect was reduced. This is presumably because, by increasing the specific surface area more than necessary, the adhesion energy between the adsorbents was improved, and the cohesion of the adsorbents proceeded, resulting in an apparent decrease in the specific surface area.
【００５１】さらに、吸着剤の比表面積が５倍以下にな
ると、吸着効果が低減した。これは、ウレタン粉末に対
する付着エネルギーが低減した結果、吸着剤をウレタン
表面上に分散することができなかったためと推測され
る。Further, when the specific surface area of the adsorbent became 5 times or less, the adsorption effect was reduced. This is presumed to be due to the fact that the adsorbent could not be dispersed on the urethane surface as a result of the decrease in the adhesion energy to the urethane powder.
【００５２】また、上記工程の中で、ウレタン粉末と水
分吸着剤をブレンドしたものを通気性の袋に挿入し、１
４０℃、２時間乾燥を行い、予め、ウレタン表面に付着
した水分の除去を行った後、もしくは同時に、真空パッ
ク後の真空断熱体に５ｋｇ／ｍ2〜１００ｋｇ／ｍ2のプ
レス圧を加えることにより、大きな密度の増加がなく、
安定な成形体を得ることができた。In the above steps, the blend of urethane powder and moisture adsorbent was inserted into a breathable bag, and
40 ° C., for 2 hours drying, preliminarily, after removing the water adhering to the urethane surface, or at the same time, adding a press pressure of 5kg / m 2 ~100kg / m 2 in the vacuum heat insulator after vacuum packing With no significant increase in density,
A stable molded product could be obtained.
【００５３】（実施例２）図２は、本発明の一実施例に
おける冷蔵庫の断面図であり、５は冷蔵庫であり、１は
真空断熱体、６は発泡合成樹脂、７はコンプレッサーで
ある。(Embodiment 2) FIG. 2 is a sectional view of a refrigerator according to an embodiment of the present invention, wherein 5 is a refrigerator, 1 is a vacuum insulator, 6 is a synthetic resin foam, and 7 is a compressor.
【００５４】真空断熱体１は、冷蔵庫側面に２枚、天面
に１枚、背面に１枚、合計４枚埋設している。適用枚数
については特に指定はなく、箱体吸熱量を低減するのに
効果がでるよう設計し枚数を決定するのが好ましい。真
空断熱体１に用いた芯材は、実施例１記載と同様の真空
断熱体である。A total of four vacuum heat insulators 1 are embedded on the side of the refrigerator, one on the top, and one on the back. The number of sheets to be applied is not particularly specified, and it is preferable to design and determine the number of sheets to be effective in reducing the amount of heat absorbed by the box. The core material used for the vacuum heat insulator 1 is the same vacuum heat insulator as described in the first embodiment.
【００５５】したがって、長期に亘って冷蔵庫を使用し
た場合においても、真空断熱体の急激な熱伝導率悪化に
起因したコンプレッサーの過剰運転による信頼性低下等
といった問題が解決される。Therefore, even when the refrigerator is used for a long period of time, problems such as a decrease in reliability due to excessive operation of the compressor due to a sudden deterioration in thermal conductivity of the vacuum insulator are solved.
【００５６】外被材としては、片面に、表面保護層がポ
リエチレンテレフタレート（１２μｍ）、中間層がアル
ミ箔（６μｍ）、熱溶着層が高密度ポリエチレン（５０
μｍ）、もう片面に、表面保護層がポリエチレンテレフ
タレート（１２μｍ）、中間層がアルミ蒸着ポリエチレ
ン・ビニルアルコール共重合体（１５μｍ）、熱溶着層
が高密度ポリエチレン（５０μｍ）をラミネートした積
層フィルムを用いている。As the jacket material, on one side, the surface protective layer was made of polyethylene terephthalate (12 μm), the intermediate layer was made of aluminum foil (6 μm), and the heat-sealing layer was made of high-density polyethylene (50 μm).
μm), on the other side, a laminated film in which the surface protective layer is laminated with polyethylene terephthalate (12 μm), the intermediate layer is laminated with aluminum vapor-deposited polyethylene / vinyl alcohol copolymer (15 μm), and the heat-welding layer is laminated with high-density polyethylene (50 μm). ing.
【００５７】両面とも、ガスバリヤ性を有するアルミを
中間層に有しているため、外被材から侵入してくるガス
量を小さくし、真空断熱体１の経時的断熱性能の悪化を
抑制している。Since both surfaces have aluminum having a gas barrier property in the intermediate layer, the amount of gas entering from the outer cover material is reduced, and deterioration of the thermal insulation performance of the vacuum thermal insulator 1 over time is suppressed. I have.
【００５８】また、片面はアルミの層が非常に薄い蒸着
層を形成したバリヤフィルムであるため、アルミを伝わ
る熱が小さく外被材を伝わる熱による断熱性能の悪化を
もたらすことがない。Since one side is a barrier film on which a very thin layer of aluminum is formed with a vapor-deposited layer, the heat transmitted through the aluminum is so small that the heat transmitted through the jacket does not deteriorate the heat insulation performance.
【００５９】前記構成は、一例であり、表面保護層に
は、突き刺し強度、曲げ強度等に優れた二軸延伸ナイロ
ン等も適用可能である。また、熱溶着層には、熱溶着性
に優れたポリプロピレン、ポリアクリロニトリル、低密
度ポリエチレン等も適用可能である。The above configuration is an example, and biaxially stretched nylon or the like having excellent piercing strength, bending strength and the like can be applied to the surface protective layer. In addition, polypropylene, polyacrylonitrile, low-density polyethylene, and the like, which are excellent in heat welding property, can be used for the heat welding layer.
【００６０】また、発泡合成樹脂６は、シクロペンタン
を発泡剤とする硬質ウレタンフォームであり、冷蔵庫の
断熱壁の中に真空断熱体１を覆うように充填され一体に
発泡されている。コンプレッサー７は、冷蔵庫の分割さ
れた各部屋の温度をそれぞれ一定に保つのに必要な運転
率で運転するよう制御されている。The foamed synthetic resin 6 is a rigid urethane foam using cyclopentane as a foaming agent, and is filled in the heat insulating wall of the refrigerator so as to cover the vacuum heat insulator 1 and is integrally foamed. The compressor 7 is controlled so as to operate at an operation rate necessary to keep the temperature of each of the divided rooms of the refrigerator constant.
【００６１】したがって、発泡合成樹脂とともに冷蔵庫
の断熱壁に使用すれば、真空断熱体の断熱性能が優れて
いるため、コンプレッサーの運転率を低減することがで
き、電力消費量を低減することができる。Therefore, when used for the heat insulating wall of a refrigerator together with the foamed synthetic resin, the vacuum heat insulator has excellent heat insulating performance, so that the operation rate of the compressor can be reduced and the power consumption can be reduced. .
【００６２】（実施例３）図３は、本発明の一実施例に
おける断熱パネルの断面図であり、８は断熱パネルであ
り、１は真空断熱体、５は硬質ウレタンフォームからな
る発泡合成樹脂、９は石膏ボードからなる面材である。(Embodiment 3) FIG. 3 is a sectional view of a heat insulating panel in one embodiment of the present invention, 8 is a heat insulating panel, 1 is a vacuum heat insulator, and 5 is a foamed synthetic resin made of rigid urethane foam. , 9 are face materials made of gypsum board.
【００６３】以上のような構成からなる断熱パネル８
は、発泡合成樹脂６と真空断熱体１を併用しているた
め、従来の硬質ウレタンフォームからなる断熱パネルに
比べ優れた断熱性能を有する。The heat insulating panel 8 having the above configuration
Since the foamed synthetic resin 6 and the vacuum heat insulator 1 are used in combination, they have better heat insulation performance than a heat insulation panel made of a conventional rigid urethane foam.
【００６４】その結果、断熱パネルの壁厚を低減でき、
施工性が著しく改善できる。また、真空断熱体１が発泡
合成樹脂６によって覆われているため、外的衝撃が真空
断熱体１に直接加わることがない。この結果、施工時等
の衝撃において真空断熱体が破袋し、断熱パネルの性能
を悪化することが原因で、結露が生じるといった問題が
解決される。さらに、真空断熱体には凝集体または成型
体が充填されているため、切断面から粉末が飛び散るこ
とがなく、施工現場での作業性を損なうことがない。As a result, the wall thickness of the heat insulating panel can be reduced,
Workability can be significantly improved. Further, since the vacuum heat insulator 1 is covered with the foamed synthetic resin 6, no external impact is directly applied to the vacuum heat insulator 1. As a result, the problem of dew condensation occurring due to the vacuum insulation breakage due to impact during construction or the like and the performance of the insulation panel being deteriorated is solved. Further, since the vacuum heat insulator is filled with the aggregate or the molded body, the powder does not scatter from the cut surface, and the workability at the construction site is not impaired.
【００６５】（実施例４）図４は、本発明の一実施例に
おける真空断熱体の減圧密封前の断面図である。図にお
いて、１０は真空包装機で、１１は真空チャンバー１２
内に設けたヒートシール機で、外被材４の開口部端面１
３をはさんで熱溶着するものである。１４はヒートシー
ル機１１の溶着板であり、１５は真空包装機１０の真空
ポンプである。(Embodiment 4) FIG. 4 is a cross-sectional view of a vacuum heat insulator before vacuum sealing in one embodiment of the present invention. In the figure, 10 is a vacuum packaging machine, 11 is a vacuum chamber 12
In the heat sealing machine provided in the inside, the opening end face 1 of the jacket material 4
3 is heat-sealed. Reference numeral 14 denotes a welding plate of the heat sealing machine 11, and reference numeral 15 denotes a vacuum pump of the vacuum packaging machine 10.
【００６６】図１の構成において、まず、硬質ウレタン
フォームを粒径分布として平均約３００μｍまで微粉砕
したウレタン粉末２（比表面積５０〜１００ｍ3／ｇ）
とこのウレタン粉末よりも５〜２０倍の比表面積を有す
る水分吸着剤３とをブレンドしたものについて、１２０
℃〜２５０℃の温度で加熱脱水を行った後、もしくは同
時に、５〜１００ｋｇ／ｃｍ2の条件下で加圧成形し板
状にしたものを、三辺に隣接する端面を熱溶着により袋
状にした外被材４に挿入する。In the configuration of FIG. 1, first, urethane powder 2 (specific surface area: 50 to 100 m 3 / g) obtained by finely pulverizing hard urethane foam to a mean particle size distribution of about 300 μm.
And a moisture adsorbent 3 having a specific surface area 5 to 20 times that of the urethane powder,
After dehydrating by heating at a temperature of from about 250 ° C. to 250 ° C., or simultaneously, forming a plate by pressing under a condition of 5 to 100 kg / cm 2 , the end faces adjacent to three sides are formed into a bag by heat welding. Is inserted into the outer cover material 4.
【００６７】その後、これを真空包装機１０のチャンバ
ー１２内に入れ、かつ、外被材４の開口部端面１３をヒ
ートシール機１１の上下の溶着板１４間に設置する。次
に、真空チャンバー１２内が１０-2ｔｏｒｒに減圧され
た状態で５分間維持した後、ヒートシール機１１が作動
し、外被材４の開口部端面１３は密封される。Thereafter, this is put into the chamber 12 of the vacuum packaging machine 10, and the opening end face 13 of the jacket 4 is placed between the upper and lower welding plates 14 of the heat sealing machine 11. Next, after maintaining the inside of the vacuum chamber 12 at a reduced pressure of 10 −2 torr for 5 minutes, the heat sealing machine 11 is operated, and the opening end face 13 of the jacket 4 is sealed.
【００６８】ここで、粉末は、凝集した状態で外被材４
に挿入するため、粉末の飛散がなくなり製造時の作業効
率が向上するものである。また、同時に、芯材を通気性
の不織布に充填する必要がなくなり、材料コストの低減
にもつながるものである。Here, the powder is aggregated in a
Therefore, the powder is not scattered and the working efficiency at the time of manufacturing is improved. At the same time, there is no need to fill the core material into a breathable nonwoven fabric, which leads to a reduction in material cost.
【００６９】[0069]
【発明の効果】以上のように、本発明の真空断熱体は、
外被材中に粉末材料からなる芯材を充填し減圧密封した
真空断熱体において、前記粉末材料が少なくとも硬質ウ
レタンフォーム粉末を有しており、これに、ウレタン粉
末よりも大きい比表面積を持つ水分吸着剤をブレンドす
ることを特徴としている。As described above, the vacuum insulator of the present invention is
In a vacuum heat insulator in which a core material made of a powder material is filled in a jacket material and sealed under reduced pressure, the powder material has at least a hard urethane foam powder, and a water having a specific surface area larger than that of the urethane powder. It is characterized by blending an adsorbent.
【００７０】これにより、ウレタン粉末に比べ、吸着剤
のウレタン粉末に対する付着エネルギーが大きくなり、
少量の添加で均一に吸着剤をウレタン表面上に分散する
ことができる。よって、吸着剤の添加量を低減すること
が可能となり、コストダウンの効果を生むと同時に、性
能面では、吸着剤自身が有する固体熱伝導を低減するこ
とができる。As a result, the adsorbent has a larger adhesion energy to the urethane powder than the urethane powder,
With a small amount of addition, the adsorbent can be uniformly dispersed on the urethane surface. Therefore, it is possible to reduce the amount of the adsorbent to be added, and it is possible to reduce the cost, and to reduce the solid heat conduction of the adsorbent itself in terms of performance.
【００７１】また、本発明の真空断熱体は、ウレタン粉
末の比表面積よりも５〜２０倍大きい比表面積を有する
水分吸着剤を用いることを特徴とする請求項１の真空断
熱体である。Further, the vacuum heat insulator according to the present invention is characterized in that a water adsorbent having a specific surface area 5 to 20 times larger than the specific surface area of the urethane powder is used.
【００７２】これにより、ウレタン粉末よりも大きい比
表面積を有する水分吸着剤の中でも上記範囲の比表面積
を有する水分吸着剤が効果的に水分を除去できるもので
ある。Thus, among the water adsorbents having a specific surface area larger than that of the urethane powder, the water adsorbent having the specific surface area in the above range can effectively remove water.
【００７３】これは、吸着剤のウレタンに対する付着エ
ネルギーが、吸着剤自身が有する運動エネルギーよりも
大きいことが寄与していると考えられる。This is considered to be due to the fact that the adhering energy of the adsorbent to urethane is larger than the kinetic energy of the adsorbent itself.
【００７４】また、本発明の真空断熱体は、１２０℃か
ら２５０℃の温度で加熱脱水を行った後、５〜１００ｋ
ｇ／ｃｍ2の条件下で加圧成形を行うことを特徴とする
請求項２記載の真空断熱体である。The vacuum heat insulator of the present invention is heated and dehydrated at a temperature of 120 ° C. to 250 ° C.
a vacuum insulation member according to claim 2, wherein the under the conditions of g / cm 2 performs pressing.
【００７５】このことにより、粉末を凝集した状態で外
被材に挿入するため、粉末の飛散がなくなり、製造時の
作業効率が向上するものである。As a result, since the powder is inserted into the outer cover material in an agglomerated state, the scattering of the powder is eliminated and the working efficiency at the time of manufacturing is improved.
【００７６】また、本発明の断熱箱体は、発泡合成樹脂
と内箱と外箱と真空断熱体とによって構成された断熱箱
体であり、この真空断熱体の構成が、粉末からなる芯材
を充填し減圧密封したものであり、この粉末材料が少な
くとも硬質ウレタンフォーム粉末を有しており、これに
ウレタン粉末よりも大きい比表面積を持つ水分吸着剤を
ブレンドすることを特徴としている。The heat-insulating box of the present invention is a heat-insulating box composed of a foamed synthetic resin, an inner box, an outer box, and a vacuum heat insulator, and the structure of the vacuum heat insulator is a core material made of powder. And sealed under reduced pressure. This powder material has at least a hard urethane foam powder, and is characterized by blending a moisture adsorbent having a specific surface area larger than that of the urethane powder.
【００７７】これにより、冷蔵庫に適用した場合、長期
に亘って使用しても真空断熱体の断熱性能を維持するこ
とができる。この結果、真空断熱体の急激な熱伝導率の
悪化に起因したコンプレッサーの過剰運転による冷蔵庫
の信頼性が低下するといった問題が解決される。Thus, when applied to a refrigerator, the heat insulating performance of the vacuum heat insulator can be maintained even when used for a long time. As a result, the problem that the reliability of the refrigerator is reduced due to the excessive operation of the compressor due to the rapid deterioration of the thermal conductivity of the vacuum heat insulator is solved.
【００７８】また、本発明の断熱パネルは、発泡合成樹
脂と面材と真空断熱体を備え、この真空断熱体は、複数
個有し、かつそれぞれの真空断熱体が発泡合成樹脂によ
って覆われている断熱パネルであり、この真空断熱体の
構成が粉末からなる芯材を充填し減圧密封したものであ
り、かつ粉末材料が少なくとも硬質ウレタンフォーム粉
末を有しており、これにウレタン粉末よりも大きい比表
面積を持つ水分吸着剤をブレンドすることを特徴として
いる。The heat insulation panel of the present invention comprises a foam synthetic resin, a face material and a vacuum heat insulator. The vacuum heat insulator includes a plurality of vacuum heat insulators, each of which is covered with the foam synthetic resin. The vacuum insulation body is filled with a core material made of powder and sealed under reduced pressure, and the powder material has at least a hard urethane foam powder, which is larger than the urethane powder. It is characterized by blending a moisture adsorbent having a specific surface area.
【００７９】これにより、真空断熱体の断熱性能が非常
に優れているため、硬質ウレタンフォーム等の発泡合成
樹脂と併用した場合、断熱パネル全体の断熱性能が硬質
ウレタンフォーム等を単独で使用した場合よりも優れた
ものとなる。As a result, the heat insulation performance of the vacuum heat insulator is very excellent. Therefore, when used in combination with a foamed synthetic resin such as rigid urethane foam, the heat insulation performance of the heat insulation panel as a whole is obtained when the hard urethane foam or the like is used alone. Will be better than
【００８０】また、真空断熱体が発泡合成樹脂で覆われ
ているため、真空断熱体に直接衝撃が加わることがな
く、破袋等によって真空断熱体の断熱性能が著しく悪化
するといった問題がない。Further, since the vacuum heat insulator is covered with the foamed synthetic resin, no direct impact is applied to the vacuum heat insulator, and there is no problem that the heat insulation performance of the vacuum heat insulator is remarkably deteriorated due to bag breakage or the like.
【００８１】さらに、現場施工によって断熱パネルを切
断する場合等も、複数個の真空断熱体を有するため、破
袋する真空断熱体は一部にすぎず断熱性能を大きく悪化
することがない。特に、真空断熱体には凝集体または成
型体が充填されているため、切断面から粉末が飛び散る
ことがなく、施工現場での作業性を損なうことがない。Further, even when the heat insulating panel is cut by on-site construction, since a plurality of vacuum heat insulators are provided, only a part of the vacuum heat insulator breaks and the heat insulating performance is not significantly deteriorated. In particular, since the vacuum insulator is filled with the aggregate or the molded body, the powder does not scatter from the cut surface, and the workability at the construction site is not impaired.
【００８２】また、本発明による真空断熱体の製造方法
は、硬質ウレタンフォーム粉末を有する芯材とウレタン
粉末よりも大きい比表面積を持つ水分吸着剤をブレンド
して得た請求項３記載の成形体を非通気性の外被材に挿
入し、内部を減圧密封した真空断熱体の製造方法に関す
るものである。The molded article according to claim 3, wherein the method for producing a vacuum heat insulator according to the present invention is obtained by blending a core material having a hard urethane foam powder and a moisture adsorbent having a specific surface area larger than that of the urethane powder. To a method for manufacturing a vacuum heat insulator in which a vacuum heat insulator is inserted into a non-breathable outer cover material and the inside thereof is sealed under reduced pressure.
【００８３】これにより、粉末を凝集した状態で外被材
に挿入するため粉末の飛散がなくなり、製造時の作業効
率が向上するものである。As a result, since the powder is inserted into the outer cover material in an agglomerated state, the scattering of the powder is eliminated, and the working efficiency at the time of manufacturing is improved.
【図１】本発明の一実施形態による真空断熱体の断面図FIG. 1 is a cross-sectional view of a vacuum insulator according to an embodiment of the present invention.
【図２】本発明の一実施形態による冷蔵庫の断面図FIG. 2 is a sectional view of a refrigerator according to an embodiment of the present invention.
【図３】本発明の一実施形態による真空断熱パネルの断
面図FIG. 3 is a cross-sectional view of a vacuum insulation panel according to an embodiment of the present invention.
【図４】本発明の一実施形態による真空断熱体の減圧密
封前の断面図FIG. 4 is a cross-sectional view of a vacuum heat insulator according to an embodiment of the present invention before sealing under reduced pressure.
１ 真空断熱体 ２ ウレタン粉末 ３ 水分吸着剤 ４ 外被材 ５ 冷蔵庫 ６ 発泡合成樹脂 ７ コンプレッサー ８ 断熱パネル ９ 面材 １０ 真空包装機 １１ ヒートシール機 １２ 真空チャンバー １３ 開口部端面 １４ 溶着板 １５ 真空ポンプ DESCRIPTION OF SYMBOLS 1 Vacuum heat insulator 2 Urethane powder 3 Moisture adsorbent 4 Jacket material 5 Refrigerator 6 Foam synthetic resin 7 Compressor 8 Heat insulation panel 9 Face material 10 Vacuum packaging machine 11 Heat seal machine 12 Vacuum chamber 13 Opening end face 14 Welding plate 15 Vacuum pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮地 法幸 大阪府東大阪市高井田本通４丁目２番５号 松下冷機株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noriyuki Miyaji 4-2-5 Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigerator Co., Ltd.
Claims (6)
し減圧密封した真空断熱体において、前記粉末材料が少
なくとも硬質ウレタンフォーム粉末を有しており、これ
に、ウレタン粉末よりも大きい比表面積を持つ水分吸着
剤をブレンドしたことを特徴とする真空断熱体。1. A vacuum heat insulator in which a core material made of a powder material is filled in a jacket material and sealed under reduced pressure, wherein the powder material has at least a hard urethane foam powder, which is larger than the urethane powder. A vacuum insulator characterized by blending a moisture adsorbent having a specific surface area.
倍大きい比表面積を有する水分吸着剤を用いることを特
徴とする真空断熱体。2. The specific surface area of the urethane powder is 5 to 20 or more.
A vacuum insulator comprising a moisture adsorbent having a specific surface area twice as large.
を行った後、もしくは加熱脱水と同時に５〜１００ｋｇ
／ｃｍ2の条件下で加圧成形を行うことを特徴とする請
求項２記載の真空断熱体。3. 5 to 100 kg after heat dehydration at a temperature of 120 ° C. to 250 ° C. or simultaneously with heat dehydration
The vacuum heat insulator according to claim 2, wherein pressure molding is performed under the condition of / cm 2 .
とによって構成された断熱箱体を用いた冷蔵庫におい
て、前記真空断熱体が請求項２記載の真空断熱体である
ことを特徴とする冷蔵庫。4. A refrigerator using a heat insulating box constituted by a foamed synthetic resin, an inner box, an outer box and a vacuum heat insulator, wherein the vacuum heat insulator is the vacuum heat insulator according to claim 2. And refrigerator.
え、前記真空断熱体が複数個あり、かつ、それぞれの真
空断熱体が発泡合成樹脂によって覆われている断熱パネ
ルにおいて、前記真空断熱体が請求項３記載の真空断熱
体であることを特徴とする断熱パネル。5. An insulating panel comprising a foamed synthetic resin, a face material, and a vacuum heat insulator, wherein a plurality of the vacuum heat insulators are provided, and each of the vacuum heat insulators is covered with the foamed synthetic resin. A heat insulating panel, wherein the body is the vacuum heat insulating body according to claim 3.
を有する芯材とウレタン粉末よりも大きい比表面積を持
つ水分吸着剤をブレンドして得た請求項３記載の成形体
を非通気性の外被材に挿入し、内部を減圧密封した真空
断熱体の製造方法。6. The molded article according to claim 3, which is obtained by blending at least a core material having a hard urethane foam powder and a moisture adsorbent having a specific surface area larger than that of the urethane powder. A method for producing a vacuum heat insulator, which is inserted and the inside is sealed under reduced pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24807597A JP4017713B2 (en) | 1997-09-12 | 1997-09-12 | Vacuum insulator, refrigerator, heat insulating panel, and method for manufacturing vacuum insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24807597A JP4017713B2 (en) | 1997-09-12 | 1997-09-12 | Vacuum insulator, refrigerator, heat insulating panel, and method for manufacturing vacuum insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1181511A true JPH1181511A (en) | 1999-03-26 |
| JP4017713B2 JP4017713B2 (en) | 2007-12-05 |
Family
ID=17172844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24807597A Expired - Fee Related JP4017713B2 (en) | 1997-09-12 | 1997-09-12 | Vacuum insulator, refrigerator, heat insulating panel, and method for manufacturing vacuum insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4017713B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758487A (en) * | 2012-07-20 | 2012-10-31 | 许昌施普雷特建材科技有限公司 | Cold storage sandwich panel |
| JP2017501350A (en) * | 2013-12-10 | 2017-01-12 | サムスン エレクトロニクス カンパニー リミテッド | Vacuum insulation material and refrigerator including the same |
| CN109779056A (en) * | 2018-12-29 | 2019-05-21 | 浙江万川装饰设计工程有限公司 | A kind of novel room is built with heat preservation noise reduction building panel |
| CN111516120A (en) * | 2020-04-16 | 2020-08-11 | 江苏德业节能科技发展有限公司 | ALC autoclaved aerated concrete slab and preparation method thereof |
-
1997
- 1997-09-12 JP JP24807597A patent/JP4017713B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758487A (en) * | 2012-07-20 | 2012-10-31 | 许昌施普雷特建材科技有限公司 | Cold storage sandwich panel |
| JP2017501350A (en) * | 2013-12-10 | 2017-01-12 | サムスン エレクトロニクス カンパニー リミテッド | Vacuum insulation material and refrigerator including the same |
| CN109779056A (en) * | 2018-12-29 | 2019-05-21 | 浙江万川装饰设计工程有限公司 | A kind of novel room is built with heat preservation noise reduction building panel |
| CN111516120A (en) * | 2020-04-16 | 2020-08-11 | 江苏德业节能科技发展有限公司 | ALC autoclaved aerated concrete slab and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| JP4017713B2 (en) | 2007-12-05 |
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